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  1. #1

    Default Emulsion Dry-time...

    OK, so I got some yellow 230's from RheemaDura screen which are awesome.

    But previously, I was using white 120's (?) which dried and exposed just fine after about 20 minutes with a fan on them after coating.

    A couple of days ago I coated and exposed the 230's in the same manner that I would have the other screens. When I sprayed out the image, my emulsion (Which is Ulano- I know... I know...) started slithering around and some of it fell off completely.

    MY QUESTION IS THIS: Doesn't this sound like it has more to do with emulsion dry-time, rather than exposure? Because the exposure worked just fine before. Perfectly before. The only difference is that the mesh is more dense, and therefore would need more dry-time, right?

    MY OTHER QUESTION IS THIS: How long should it take to completely dry before I can expose?

  2. #2
    Premium Member
    caribou's Avatar


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    Default

    i usually found with the ulano QTX that my drying time with a fan was at least 45 minutes, but it was easy to tell if it was still wet or not. i have had it look nice and dry, exposed it, and had it come off in sheets during washout, but i bumped up the exposure time, and haven't had a problem since.

  3. #3

    Default

    And I guess they should be flat while drying, huh?

  4. #4
    Premium Member
    Unitus's Avatar


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    Default Re: Emulsion Dry-time...

    Quote Originally Posted by dennyschmickle
    A couple of days ago I coated and exposed the 230's in the same manner that I would have the other screens. When I sprayed out the image, my emulsion (Which is Ulano- I know... I know...) started slithering around and some of it fell off completely.
    i used to have the same problem when i only allowed an hour or so to dry. i now coat a day in advance, and let it dry overnight. i know that's probably overkill, but i'd rather have a solid stencil than worry about runny emulsion.

  5. #5

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    Wow.
    That's... so long. ugh.

  6. #6
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    Unitus's Avatar


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    like i said, it's overkill...

    but it's just planning. if i'm gonna print tomorrow, i coat tonight.

    i've had too many posters fucked up with runny emulsion. not gonna chance it.

  7. #7
    micahmax's Avatar

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    i always do the overnight route. i was taught that way... i didn't know you could do it any sooner... haha

  8. #8
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    steve w's Avatar

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    Ulano QTX with fan.
    20 minutes.
    Did you degrease?
    Did you abrade?
    "I guarantee, the image will not be fade off and you will be pleasure it too. " - a bootlegger
    We need to print a tshirt "Avoid sucker effect!"-Fabio
    "fudge isn't sharp"-phoondaddy

  9. #9

    Default

    I'm going to go ahead and say no.
    I don't even know this "abrade" you speak of.

  10. #10
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    steve w's Avatar

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    There's your problem.
    When you get new screens, you need to abrade them.
    You can buy a commercial abrader/degreaser OR
    what I do is buy some Soft Scrub (without bleach if possible, but with will
    work, too)
    Wet down the screen and use a scrub brush to work the "abrader" in
    on both sides.
    Let the screen sit for a couple minutes, then wash out COMPLETELY.

    This helps the mesh accept the emulsion.
    "I guarantee, the image will not be fade off and you will be pleasure it too. " - a bootlegger
    We need to print a tshirt "Avoid sucker effect!"-Fabio
    "fudge isn't sharp"-phoondaddy

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